Loans - Disaggregation of Criticized Loans by Year of Origination (Details) - USD ($) $ in Millions		Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net	[1]	$ 62,014	$ 58,987
Commercial loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		3,253	4,656
One year prior to current year		4,307	3,868
Two years prior to current year		3,446	3,250
Three years prior to current year		3,128	1,388
Four years prior to current year		1,040	2,354
Prior		12,451	11,069
Revolving Loans		13,179	13,054
Revolving Loans Converted to Term Loans		311	318
Loans, net		41,115	39,957
Commercial loans | Business and corporate banking
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		1,409	1,270
One year prior to current year		1,356	1,148
Two years prior to current year		1,118	1,074
Three years prior to current year		1,261	231
Four years prior to current year		176	561
Prior		4,096	4,253
Revolving Loans		6,696	6,922
Revolving Loans Converted to Term Loans		308	265
Loans, net		16,420	15,724
Consumer loans
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		3,034	2,726
One year prior to current year		2,523	2,841
Two years prior to current year		2,731	4,125
Three years prior to current year		3,984	2,799
Four years prior to current year		2,672	1,272
Prior		5,765	5,061
Revolving Loans		190	206
Loans, net		20,899	19,030
Consumer loans | Residential mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		2,996	2,646
One year prior to current year		2,443	2,764
Two years prior to current year		2,660	4,107
Three years prior to current year		3,965	2,770
Four years prior to current year		2,649	1,244
Prior		5,522	4,810
Revolving Loans		0	0
Loans, net		20,235	18,341
Consumer loans | Home equity mortgages
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		38	80
One year prior to current year		80	69
Two years prior to current year		67	11
Three years prior to current year		9	22
Four years prior to current year		18	25
Prior		181	182
Revolving Loans		0	0
Loans, net		393	389
Consumer loans | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Current year		0	0
One year prior to current year		0	0
Two years prior to current year		0	0
Three years prior to current year		0	0
Four years prior to current year		0	0
Prior		0	0
Revolving Loans		185	199
Loans, net		$ 185	$ 199

[1] The following table summarizes assets and liabilities related to our consolidated variable interest entities ("VIEs") at September 30, 2024 and December 31, 2023. Assets and liabilities exclude intercompany balances that eliminate in consolidation. See Note 15, "Variable Interest Entities," for additional information. September 30, 2024December 31, 2023(in millions)AssetsOther assets$13 $23 Total assets$13 $23 LiabilitiesInterest, taxes and other liabilities$21 $17 Total liabilities$21 $17